The Office of Policy and International Affairs at the U.S. Department of Energy published a report on energy and water for sustainable societies presented at the World Summit on Sustainable Development, Johannesburg, 2002. This report grew out of an April 2001 study on energy prepared by the U.S. Agency for International Development (USAID) for the ninth session of the United Nations Commission on Sustainable Development. The study, called Energy for Life, A Case Study Compendium, contained 35 examples demonstrating the variety of ways that energy technologies can improve quality of life and showing the dramatic impact these technologies can have on economic development. Although the water and energy projects highlighted in this report are diverse, they all have one thing in common: receipt of private-sector funding.